As per Albert Einstein 'Coincidence is God's way of remaining anonymous'. Major Historical Events such as Pearl Harbor, the JFK murder, the 9-11 terrorist attack all have a myriad of bizarre, un-explainable and seemingly impossible coincidences associated with them. 'A coincidence can be logically defined as a surprising concurrence of events, perceived as meaningfully related, with no apparent causal connection.' Memories, Dreams, Reflections - Carl Jung
Carl Jung's theory of Synchronicity, somewhat summarized above, attempts to explain coincidences in personal lives as an extension and/or communication from ones psyche, God, or guardian angel in a rational guise , one could also argue that Historical Coincidence or societal synchronicity are of the same genre.